Update git submodules

* Update docs/submodules/functest from branch 'stable/euphrates'
  - Create subnet and net within the same project

    It is required to create a network and subnet within the same project
    for some SUTs.

    Change-Id: Icd02edb0aebee93713f315cdbbeb021e9ae82dae
    Signed-off-by: Linda Wang <wangwulin@huawei.com>
    (cherry picked from commit f06d3e13cdee669e53f6a1c75039c9b3c3430a8a)

diff --git a/docs/submodules/functest b/docs/submodules/functest
index eccd246..488d5c8 160000 (submodule)
--- a/docs/submodules/functest
+++ b/docs/submodules/functest
@@ -1 +1 @@
-Subproject commit eccd2461a9272191b1baa312624158de8da84fc9
+Subproject commit 488d5c8496fb7c8259a9aeef9f2ad6d437f3aeae